The research project is centred on the development of new gold catalyzed transformations in N-acyliminium ion chemistry. The objective of our first part of the project is to develop an enantioselective gold-catalyzed 5 exo-dig intramolecular hydroalkoxylation/aza-Ferrier-Petasis rearrangement sequence. This sequence could give an asymmetric and atom economic expeditious access to the structure of hydropyrrolizidines, which are known to be potential biologically active compounds. A second part of the project is devoted to the development of the first catalytic alkynylation of cyclic N-acyliminium ions using N,O-acetals. This type of reaction is potentially an important transformation, giving rise to propargylic amine derivatives amenable to further interesting synthetic manipulations en route to nitrogen-containing natural products and some analogs. Considering our objectives, key features is the use of TMS alkynes in conjunction with gold complexes that have been paired with poorly nucleophilic counter-ions. To broaden the scope of catalysis based on gold, it is important to extend the range of substrates and functional groups that can be activated by gold complexes. A final section is devoted to the sequential catalysis which designs the promotion of catalytic multistep processes. In this way, two fundamentally distinct chemical transformations are catalytically promoted in a single flask. This research area allows the rapid and efficient reach of complex molecular frameworks with improved yields and resource efficiency. Therefore, this is an exciting theme in modern organic synthesis that has recently stimulated the report of numerous excellent contributions.